async navigate() {
        await this.page.goto('https://www.saucedemo.com/v1/index.html');
    }

    async login(username, password) {
        await this.usernameInput.fill(username);
        await this.passwordInput.fill(password);

        await this.usernameInput.fill(username);
        await this.passwordInput.fill(password);
        await this.loginButton.click();

        await this.passwordInput.fill(password);
        await this.loginButton.click();
    }

    async addItemToCart() {
        await this.addToCartButton.first().click();
    }

    async addItemToCart() {
        await this.addToCartButton.first().click();
    }

    async goToCart() {
        await this.cartIcon.click();
    }

    async proceedToCheckout() {
        await this.checkoutButton.click();
    }

    async enterCheckoutInformation(firstName, lastName, postalCode) {
        await this.firstNameInput.fill(firstName);
        await this.lastNameInput.fill(lastName);

        await this.firstNameInput.fill(firstName);
        await this.lastNameInput.fill(lastName);
        await this.postalCodeInput.fill(postalCode);

        await this.lastNameInput.fill(lastName);
        await this.postalCodeInput.fill(postalCode);
        await this.continueButton.click();

        await this.postalCodeInput.fill(postalCode);
        await this.continueButton.click();
    }

    async finishCheckout() {
        await this.finishButton.click();
    }

    async isCheckoutComplete() {
        return await this.completeHeader.isVisible();
    }

        const isComplete = await checkoutCompletePage.isCheckoutComplete();
        expect(isComplete).toBeTruthy();